ILD-JND for pitch-mismatched tones (Bernhard Laback )

Hello everybody,
Can anybody point me to work on ILD-JNDs for interaurally
pitch-mismatched tones as a function of the degree of pitch-mismatching
(the frequency difference)?
My experience is that the JND increases as soon as the frequency
difference exceeds a critical value above which a split image are heard
rather than one fused image. Consequently, ILD-detection for split
images appear to be achieved by loudness comparison between the two
ears.
Thanks
Bernhard
--
Dr. Bernhard Laback
Acoustics Research Institute
Austrian Academy of Sciences
Liebigg. 5, A-1010 Wien,
Austria
Tel.: 0043-1-4277-29514
Fax.: 0043-1-4277-9296
http://www.kfs.oeaw.ac.at/